A composite structure is disclosed that includes a support wafer and a layered structure on the support wafer. The carousel is provided with the blades of L-shaped stalls which pass cyclically and in the right phase between and underneath pairs of supports, to raise the\u201d products positioned thereon and set them on a horizontal conveyor. The second conveyor conveys workpiece groups each including a combination of the workpieces. The first end has an annular groove. The domed arch is pivotally connected to a swivel.